<%@ page import="java.util.List" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.DriverManager" %><%--
  Created by IntelliJ IDEA.
  User: ASUS
  Date: 2018/4/3
  Time: 15:56
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>用户列表</title>
</head>
<body>


<style type="text/css">
    table{
        border-collapse: collapse;
    }
    td{
        border: 1px solid #000;
        padding: 10px;
    }

</style>
<a href="addUser.jsp" >添加用户</a>
<table>
    <thead>
    <tr>
        <td>编号</td>
        <td>用户名</td>
        <td>密码</td>
        <td>操作一</td>
        <td>操作二</td>
    </tr>
    </thead>

    <tbody>
    <%
        class User {
            int id;
            String username;
            String password;

            public User(int id, String name, String password) {
                this.id = id;//this表示类或者对象的所有者
                this.username = name;
                this.password = password;
            }
        }

        List<User> list = new ArrayList<User>();

        //从数据库中读取数据，并且放在userList中
        //3+1

        Connection connection=null;
        Statement statement=null;
        ResultSet resultSet=null;

        String sql="select * from t_users";
        Class.forName("com.mysql.jdbc.Driver");
        connection= DriverManager.getConnection("jdbc:mysql://localhost/sctu_javaweb_2018","root","12306");

        statement=connection.createStatement();
        resultSet=statement.executeQuery(sql);

        while(resultSet.next()){
            int id=resultSet.getInt(1);
            String username=resultSet.getString(2);
            String password=resultSet.getString(3);

            User user = new User(id, username, password);
            list.add(user);

            //alt+f1
            //ctrl+m

        }

        resultSet.close();
        statement.close();
        connection.close();

//        User Bob=new User();
//        Bob.id=1;
//        Bob.username="SpongeBob";
//        Bob.password="jkbduiadj";
//        userList.add(Bob);
//
//        User tom=new User();
//        tom.id=2;
//        tom.username="tom";
//        tom.password="233233233";
//        userList.add(tom);
//
//        for(User user:userList){
//            //221
//            out.write("<tr><td>"+user.id+"<td>"+user.username+"</td><td>"+user.password+"</td></tr>");
//        }

        for (User user : list) {

            out.write("<tr>" +
                    "<td>" + user.id + "</td><td>" + user.username + "</td>" +
                    "<td>" + user.password + "</td>" +
                    "<td><a href='userUpdate.jsp?id=" + user.id + "&username=" + user.username + "&password=" + user.password + "'>更新</a></td>" +
                    "<td><a href='userDelete.jsp?id=" + user.id + "'>删除</a></td>" +
                    "</tr>");
        }

    %>
    </tbody>
    <tfoot></tfoot>

</table>
</body>
</html>
